引水工程超深圆形基坑施工风险分析与质量控制  

Construction Risk Analysis and Quality Control of Super Deep Circular Foundation Pit for Water Diversion Project

作　　者：胡开富 龚振宇 徐前卫[3] 孙梓栗 HU Kaifu;GONG Zhenyu;XU Qianwei;SUN Zili(Kunming Branch of Central Yunnan Provincial Water Diversion Project Construction Administration Branch,Kunming,Yunnan 655600,China;The Electricity Engineering Co.,Ltd.Under CREC No.5 Group,Changsha,Hunan 410205,China;Key Laboratory of Road and Traffic Engineering of Ministry of Education,Tongji University,Shanghai 201804,China)

机构地区：[1]云南省滇中引水工程建设管理局昆明分局,云南昆明655600 [2]中铁五局电务城通公司,湖南长沙410205 [3]同济大学道路与交通工程教育部重点实验室,上海201804

出　　处：《水利与建筑工程学报》2020年第5期143-148,共6页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金项目(41672360);住房和城乡建设部研究开发项目(2018-K9-076)。

摘　　要：结合超深基坑及圆形基坑施工特点,以滇中引水龙泉倒虹吸盾构接收井工程为例,采用半定量的LEC法对该基坑开展风险评估。首先结合圆形基坑施工难点,对地连墙施工至基坑开挖的全过程中出现的风险源进行识别,然后基于LEC法对地连墙施工、钢筋施工、起重吊装、模板工程、基坑开挖施工五个方面的风险情况进行指标化分析,从而判定工程各施工阶段的风险源分级,并制定相应的质量控制措施专项方案。通过该方法进行风险分析,可以有效确保工程的施工安全,对同类超深圆形基坑也具有一定的指导借鉴意义。Based on the construction characteristics of ultra-deep foundation pits and circular foundation pits,Longquan Inverted Siphon Shield Receiving Well in Central Yunnan was taken as an example and the semi-quantitative LEC method was adopted to carry out risk assessment of the foundation pit.Firstly,combined with the difficulties in the construction of circular foundation pits,we identify every risk sources appearing in the whole process from the construction of the ground connection wall to the excavation of the foundation pit.Then based on the LEC method,the risk analysis of the five aspects of foundation pit excavation which contain the construction of the ground connection wall,reinforcement construction,lifting and lifting,formwork engineering,is indexed to determine the risk source grading at each stage of the project,and formulate a special plan for quality control measures.Through this method for risk analysis,it can effectively ensure the construction safety of the project,and it also has certain guiding significance for similar ultra-deep circular foundation pits.

关 键 词：超深基坑 圆形基坑 风险评估 质量控制 

分 类 号：TV671[水利工程—水利水电工程]